package com.example.forum.controller;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.service.IArticleService;
import com.example.forum.service.IBoardService;
import com.sun.istack.internal.NotNull;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;

@Api(tags = "文章接口")
@Slf4j
@RestController
@RequestMapping("/article")
public class ArticleController {
    @Resource
    private IArticleService articleService;
    @Resource
    private IBoardService boardService;

    //发布新帖子
    @ApiOperation("发布新帖子")
    @PostMapping("/create")
    public AppResult create(HttpServletRequest request,
                            @ApiParam("版块Id") @RequestParam("boardId") @NonNull Long boardId,
                            @ApiParam("文章标题") @RequestParam("title") @NonNull String title,
                            @ApiParam("文章内容") @RequestParam("content") @NonNull String content){
        //校验用户是否禁言
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getState()==1){
            //用户已禁言
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //版块的校验
        Board board=boardService.selectById(boardId.longValue());
        if(board==null||board.getDeleteState()==1||board.getState()==1){
            log.warn(ResultCode.FAILED_BOARD_BANNED.toString());
            return AppResult.failed(ResultCode.FAILED_BOARD_BANNED);
        }
        //封装文章对象
        Article article=new Article();
        article.setTitle(title);
        article.setContent(content);
        article.setBoardId(boardId);
        article.setUserId(user.getId());
        //调用service
        articleService.create(article);
        //响应
        return AppResult.success();
    }

    @ApiOperation("获取帖子列表")
    @GetMapping("/getAllByBoardId")
    public AppResult<List<Article>> getAllByBoardId(@ApiParam("版块Id") @RequestParam(value = "boardId",required = false) Long boardId){
        List<Article> articles;
        if(boardId==null){
            //查询所有
            articles=articleService.selectAll();
        }else{
            articles=articleService.selectAllByBoardId(boardId);
        }
        if(articles==null){
            //如果集合为空，那么创建上个空集合
            articles=new ArrayList<>();
        }
        //响应结果
        return AppResult.success(articles);
    }

    @ApiOperation("根据帖子id获取详情")
    @GetMapping("/details")
    public AppResult<Article> getDetails(HttpServletRequest request,
            @ApiParam("帖子Id") @RequestParam("id") @NonNull Long id){
        //从session中获取当前登录的用户
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //调用service，获取帖子详情
        Article article=articleService.selectDetailById(id);
        //判断是否为空
        if(article==null){
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //判断当前用户是否为作者
        if(user.getId()==article.getUserId()){
            article.setOwn(true);
        }
        return AppResult.success(article);
    }

    @ApiOperation("修改帖子")
    @PostMapping("/modify")
    public AppResult modify(HttpServletRequest request,
                            @ApiParam("帖子Id") @RequestParam("id") @NonNull Long id,
                            @ApiParam("帖子标题") @RequestParam("title") @NonNull String title,
                            @ApiParam("帖子正文") @RequestParam("content") @NonNull String content){
        //获取当前登录用户
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //检验用户状态
        if(user.getState()==1){
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //查询帖子详情
        Article article=articleService.selectById(id);
        if(article==null){
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //判断用户是不是作者
        if(user.getId()!=article.getUserId()){
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //判断帖子状态
        if(article.getState()==1||article.getDeleteState()==1){
            return AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED);
        }
        //调用service
        articleService.modify(id,title,content);
        log.info("帖子更新成功，Article id="+id+",User id="+user.getId());
        return AppResult.success();
    }

    @ApiOperation("点赞")
    @PostMapping("/thumbsUp")
    public AppResult thumbsUp(HttpServletRequest request,
            @ApiParam("帖子Id") @RequestParam("id") @NotNull Long id){
        //校验用户的状态
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //判断用户是否被禁言
        if(user.getState()==1){
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //调用
        articleService.thumbsUpById(id);
        return AppResult.success();
    }

    @ApiOperation("删除帖子")
    @PostMapping("/delete")
    public AppResult deleteById(HttpServletRequest request,
                                @ApiParam("帖子Id") @RequestParam("id") @NotNull Long id){
        //校验用户状态
        HttpSession session=request.getSession(false);
        User user= (User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getState()==1){
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //查询帖子详情
        Article article=articleService.selectById(id);
        //校验帖子状态
        if(article==null||article.getDeleteState()==1){
            return AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS);
        }
        //校验当前用户是不是作者
        if(user.getId()!=article.getUserId()){
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //调用service
        articleService.deleteById(id);
        //返回操作成功
        return AppResult.success();
    }

    @ApiOperation("获取用户的帖子列表")
    @GetMapping("/getAllByUserId")
    public AppResult<List<Article>> getAllByUserId(HttpServletRequest request,
                                    @ApiParam("用户Id") @RequestParam(value = "userId",required = false) Long userId){
        //如果userId为空，就从session中获取当前登陆的用户Id
        if(userId==null){
            //获取session
            HttpSession session=request.getSession(false);
            //获取user对象
            User user=(User)session.getAttribute(AppConfig.USER_SESSION);
            userId=user.getId();
        }
        //调用service
        List<Article> articles=articleService.selectByUserId(userId);
        return AppResult.success(articles);
    }
}
